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Originally Posted by madshi
FWIW, I've just accidently looked at my h264 header parser. It has a few custom aspect ratios. E.g. there is "16:11 720x576 16:9 frame with horizontal overscan". If I do the math, this specific aspect ratio ends up with 1047x576. Which happens to be the exact resolution 704 pixels would end up with. So I guess 704 pixels seems to be the "magic" number here for ITU scaling? If I follow the ARs defined in the h264 spec, I would end up with the following resolutions:
PAL 4:3 - 785x576
PAL 16:9 - 1047x576
NTSC 4:3 - 655x480
NTSC 16:9 - 873x480
I could offer this as an "ITU Aspect Ratio" option, in case madVR gets PAL/NTSC content with non-ITU 4:3 or 16:9 Aspect Ratios. Objections, anyone?
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IMHO, the whole ITU and non-ITU topic is already confusing the hell ouf of the majority of people which are using madVR. It will be used very rarely, if at all.
It certainly wouldn't hurt to offer it as an option, since I own about 800 DVDs (the majority is in NTSC format) I would like to give this a try myself. But I am not sure if I can even see a huge difference and if I want to go into the settings every time to change it.